Hair loss after Maropitant (Cerenia) in dogs

The FDA has received 117 reports of hair loss in dogs after Maropitant. That is 1.0% of all reports for this medicine, compared with 1.0% across reports for all dog medicines.

117Reports

51%Marked serious

10%Recovered

12%Died or euthanised

8 daysTypical onset

How soon it started

Same day

21 23%

1–2 days

14 15%

3–7 days

11 12%

1–4 weeks

19 21%

Over a month

27 29%

How the animals did

Recovered

12 10%

Still unwell when reported

56 48%

Died

5 4.3%

Euthanised

9 7.7%

Not known

35 30%

Problems reported at the same time

Loss of appetite

46 39%

Injection site reaction

45 38%

Vomiting

31 26%

Skin rash or irritation

26 22%

26 22%

25 21%

24 21%

22 19%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Maropitant prevents vomiting and motion sickness.

Products with this ingredient include Cerenia. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Maropitant cause hair loss in dogs?: 117 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 8 days of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

All reported side effects of Maropitant in dogs · Medicines most reported with hair loss